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CVE Record

CVE-2026-15483: TRENDnet TEW-821DAP ssi tools_nslookup sub_41EC14 buffer overflow

A security vulnerability has been detected in TRENDnet TEW-821DAP 1.12B01. Impacted is the function sub_41EC14 of the file /goform/tools_nslookup of the component ssi. The manipulation of the argument nslookup_target leads to buffer overflow. It is possible to initiate the attack remotely. The vendor explains: "We are unable to confirm the existence of the vulnerabilities for (...) TEW-821DAP (v1.0R) as these items have been EOL. " This vulnerability only affects products that are no longer supported by the maintainer.

CriticalCVSS 9Not KEV-listedUpdated
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Glexia's TakeAutomated analysiscritical

Security readout for executives and security teams

Plain-English summary

CVE-2026-15483 is a reported buffer overflow in an end-of-life TRENDnet TEW-821DAP access point firmware version. A remote authenticated user could potentially compromise the device through the nslookup tool. Because the product is no longer supported, replacement or isolation is the practical business concern.

Executive priority

High priority for networks using this EOL access point. The main decision is operational: replace or strongly isolate affected devices, because vendor support and confirmed fixes are not established in the provided sources.

Technical view

The issue affects TRENDnet TEW-821DAP firmware 1.12B01 in /goform/tools_nslookup, component ssi. Manipulating nslookup_target reaches function sub_41EC14 and may trigger a buffer overflow. CVSS v2 is 9.0 with network access, low complexity, and authentication required. The vendor reportedly could not confirm EOL device vulnerabilities.

Likely exposure

Exposure is likely limited to organizations still operating TEW-821DAP v1.12B01, especially where the device management interface is reachable by non-administrative networks. Authentication is indicated as required, but compromised credentials or shared admin access could increase risk.

Exploitation context

The provided sources describe remote initiation and high impact, but do not show CISA KEV listing or confirmed active exploitation. Treat this as a serious EOL-device risk, not as a confirmed in-the-wild campaign based on current evidence.

Researcher notes

Evidence comes primarily from VulDB/CVE records and a linked GitHub research reference. The CVE has unconfirmed report confidence in the CVSS vector and affects unsupported hardware. Avoid assuming exploit availability or a vendor patch unless confirmed by updated vendor guidance.

Mitigation direction

  • Identify and prioritize replacement of affected EOL TEW-821DAP devices.
  • Restrict management access to trusted administrative networks only.
  • Disable unnecessary remote administration exposure where possible.
  • Review TRENDnet and cited advisories for any updated guidance.
  • Use compensating controls if immediate replacement is not possible.

Validation and detection

  • Inventory TRENDnet TEW-821DAP devices and firmware versions.
  • Confirm whether firmware 1.12B01 is present.
  • Verify management interfaces are not internet-exposed.
  • Review access logs for unusual nslookup tool activity.
  • Check whether admin credentials are unique and tightly controlled.
Prepared
Confidence
medium
Sources
7

Public sources used

Generated from the cited source records. This long-tail analysis has not been individually reviewed by a named human.

Potential ATT&CK relevance

Conservative CVE-to-ATT&CK context

These mappings and lookup hints may be relevant to the vulnerability behavior, CWE, affected product, or exposure path. Glexia-inferred context is not an official MITRE, ATT&CK, CWE, or CVE Program mapping.

ATT&CK lookup starting points

Use these exact CWE pages and searches to review the Glexia ATT&CK library from this CVE's weakness and description context.

cwe · low confidence lookup

CWE-119: Exact CWE lookup

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cwe · low confidence lookup

CWE-120: Exact CWE lookup

Use the exact CWE identifier as the starting point before reviewing related ATT&CK behavior. Open the exact CWE lookup page first, then review the ATT&CK searches from that MITRE weakness context. This is a Glexia lookup hint, not an official ATT&CK mapping.

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cve · low confidence lookup

CVE-2026-15483 mapping review

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Vulnerability profileCVE Program record
Severity
Critical
CVSS
9 (2.0)
Known Exploited
No
Published

Vector: AV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR

Official CVE source material

CNA and ADP enrichment extracted from CVE v5

These fields come from the CVE record and ADP containers, not from Glexia's Take. They preserve time-varying source decisions such as CISA SSVC, KEV status, CVSS metrics, and provider references.

4CVSS vectors
6Timeline events
0ADP providers
6Source links

CVSS vector scores

4 official scores

We collect every scored CVSS vector available in the official CNA and ADP containers. When more than one version is present, the table keeps the source vectors side by side instead of collapsing them into the highest score.

ScoreVersionSeverityVectorExploitImpactSource
9CVSS 2.0CriticalAV:N/AC:L/Au:S/C:C/I:C/A:C/E:ND/RL:ND/RC:UR810VulDB
8.8CVSS 3.1HighCVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R2.85.9VulDB
8.8CVSS 3.0HighCVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H/E:X/RL:X/RC:R2.85.9VulDB
8.7CVSS 4.0HighCVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X——VulDB

Vulnerability scoring details

Base CVSS 4.0 score

8.7High
CVSS 4.0 vector shape for CVE-2026-15483Attack VectorAttack ComplexityAttack RequirementsPrivileges RequiredUser InteractionVS ConfidentialityVS IntegrityVS AvailabilitySS ConfidentialitySS IntegritySS Availability

Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N/E:X

Attack Vector
NetworkAdjacentLocalPhysical
Attack Complexity
LowHigh
Attack Requirements
NonePresent
Privileges Required
NoneLowHigh
User Interaction
NonePassiveActive
VS Confidentiality
HighLowNone
VS Integrity
HighLowNone
VS Availability
HighLowNone
SS Confidentiality
HighLowNone
SS Integrity
HighLowNone
SS Availability
HighLowNone

Vulnerability timeline

Timeline events are normalized from CVE metadata, CNA source timelines, ADP timelines, and KEV metadata when present.

  1. Source timelineVulDB

    Advisory disclosed

  2. Source timelineVulDB

    VulDB entry created

  3. CVE reservedCVE Program

    The CVE ID was reserved by the assigning CNA.

  4. Source timelineVulDB

    VulDB entry last update

  5. CVE publishedCVE Program

    The CVE record was published.

  6. CVE updatedCVE Program

    The CVE record metadata indicates this as the latest update time.

Source materials

Affected products

Products and packages named in the record

VendorProductVersion / packageStatus
TRENDnetTEW-821DAP1.12B01Listed
Weakness

CWE details

CWE-119CWE-120

CWE links open Glexia weakness intelligence pages with official CWE context, developer remediation guidance, and related CVE mappings.